Blow-off valve.



H. W. JACOBS.

v BLOW-0P1 VALVE.

AIPLIUATIOK FILED n11. 12,1910.

Patented Opt. 25, 1910.

HENRY W. JACOBS, F TOPEKA, KANSAS.

BLOW-OFF VALVE.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed April 18, 1910. Serial No. 556,059.

To all uihom it may concern:

Be it known that I, HENRY I citizen of the United'State's, and residentof steam boiler but more especially to the boiler I of a locomotive. Asblow-oil valves are subthe injurious effects of sediment and scalesfound in the water of a boiler, I

jected to have so designed my valve that the means for making e valvesteam and water tight are not brou ht into direct contact with theblow-oflt pr nets.

' A further object of my invention is to provide a simple constructionemploying few parts; the parts subjected to wear being easily removedand "replaced or renewe without the necessity of removing the valve fromthe boiler, thereby obviating the ditliculty caused by the necessity offrequently having to remove valves of this nature from the boiler for.repairs.

' The nature of my invention will be more fully understood from thefollowing detailed description of the drawing, wherein- Figure 1 is avertical cross-sectional view 'throu "h the valve. Fig. 2 represents ahorizonta sectional view on line A--B of Fig. 1. 3. is a perspectiveview of one form on style of packing ring. Fig. 4 is across sectionalview of the packing ring shown in Fig. 3. Fig.'5

.fied form of packing members as shown.

is a cross-sectional view of a packing ring composed of metal andfibrous material. Fig. 6 1s a Silllllfll' vlew of a modirin com risinfour 'My invention consists of the hollow cylin I drical plunger 1,which is open at the bottom and one side. The plunger is mounted in asuitable casing or body 2, in which it is caused to reciprocate by meanshereinafter specified. .T-he valve-body 2 is provided with a hollowpassage or inlet opening 3 which communicates with an opening in' theside of the hollow cylindrical plunger 1 when the latter is in its'loweror open position as shown in Fig. 1, thus forming a continuous pgssagethrough which the contents of the.

iler may escape. When the hollow cylindrical plunger 1 is moved towardthe other W. J ACOBS, a.

I have invented a certain new and useful Improvement in Blow-Oil Valves,of rcferagainst the packin rotatingand getting out vided at its free endwith sin-opening or upper portion of the casing 2, the passa e in thevalve body or casing will be closed y the wall of the plunger; theopening in the plunger side being moved out of register with saidpassage 3 in the casing 2. To prevent the contents of the boiler fromescapingbetween the walls of the valve cas- Y ing and the plunger,packing rings 4 and 5 are provided above and below the passage throughthe valve-casing and surrounding the cylindrical plunger 1. Thesepacking rings 4t and 5 may be made of any suitable material butpreferably of metals and composed of several members or rings as illustrated, and are laced-on the beveled surfaces in the-i tenor of thecasing above and below the inlet opening. The top packing ring 4, isadjusted to the desired ressure by means ofthenuts 6, 6, on the stu s7,7; the tightening of the nuts will force the tapering end or face ofthe cy indrical'valve cap 8 and compress'it. It is at other means maybeevident however, t y employed to form a tight joint between the plungerand its casing.

The valve cap 8 is with a square opening which the rectangular stem 9,attached to the cylindrical plunger 1, passes. This stem is preferablyscrewed. into the upper wall of the plunger as shown; the stem may beprovided with a shoulder adj acent the screwthreads adapted to take'onto the lunger and insure. a tight joint being forme at the point ofattachment. This rectangular stem passing through a-square opening inthecap 8, prevents the cylindricalplunger 1, from of faline'ment. Thealso prevents dust" preferably provided in its top through valve cap, ormember 8 'or. dirt gettin on the smooth exterior sur- 1 face of the cyindrical plunger 1 and there i by carried into the casing 2 and embeddedp, in the packing rin s. i The bottom pisc ing ring 5 ,is adjusted J99"tightening the nuts. 10., 10, the studs 1 1,- 11, whereby the taperingend-orffacexofjt a cylindrical member or sleeve .12; wi11 I forcedagainst the packing ring and press it. The sleeve or valve cap-12 '1s"rably threadedas shown, pipre maybe attached.

' he valvemay-be-operatec'l. byany'.

to which able mechanism attached to the eye-coupling; 1.3,suitablysecured tothe stem g I preferJtocmpl y composite pacl'tji'ngofthe ring 14; the tapered edges of the composite rings conforming withthe beveled or sloping walls or surfaces of the easing-interior and theends of the cap and sleeve members 8 and 12 secured at opposite ends ofthe casing as shown in Fig. 1, so

. that the rings tend toward the plunger- The rings 14, 15, andlfi areshown split, see Fig. 3, permitting of their adjustment, that iscontraction or expansion, through the action of the adjusting meansheretofore described. When insertin the packing, the rings composing thepac ring are so placed as to bring the split portions-at differentpoints about the peripheries of the packing as shown in Fig. 3. Bystaggering the rings in this manner, the possibility for leakage throughthe packing is obviated. v

I prefer to employ metallic packing composed of three rings as describedand shown in Figs. 1, 3 and 4', but instead of using the metallic ring14, a rin 17 of fibrous material may be employe as this ring is notsubjected to the conditions encountered by the rings 15 and 16, whichcontact with the plunger.

I find that a much more eflicient packing is produced by employing anumber of rings; and instead of using three rings as described, thenumber may be varied, as shown for example in Fig. 6, where the packing,in addition to the rings 15 and 16, is composed of the outer rings 18and 19; that is, the outer ring 14 shown in Fig. 4 is divided into theseparate rings 18 and 19. By employing at least two rings 15 and 16 forthe inner circumference of the packing, it is apparent that theslits inthe respective rings may be so laced as to prevent a direct passagethrong 1 the packing.

The construction I have devised overcomes difiiculties that have beenencountered in the constructions heretofore employed; and at the sametime a device simple and inexpensive in construction is produced.

As the device illustrated and described may be altered in minor detailswithout departing from the spirit of my invention, I do not wish to beunderstood as limiting myself to the exact construction shown anddescribed, but

1 lVhat I claim and: wish to secure by Lettcrs Patent, is l 1. Ablow-01f valve comprising a casing having inlet and outlet op rln S, theinner wall of the casing being provic ed with oppositely beveledsurfaces above and below the inlet. opening, a hollow cylindricalplnnger open at one end and provided with an opening in its side Walladapted to register with the inlet opening in the casing, means securedto the closed cnd of the plunger whereby the latter is reciprocated inthe casing, members adjustably secured to the opposite ends of thecasing, one of said members having a closed end to form a hood intowhich the plunger 1.'c *i ')rocates when the valve is closed, a pair ofbeveled C0111- posite meking-rings seated on the beveled surfaces in thecasing, and means-wherel y the packing-rings are cmltrolled.

2. A blow ofl valve comprising a casing provided with inlet and outlet;openings, a hollow cylindri tal plunger open at one end and having anopening through its side-wall whereby a passage through the plunger isformed, a pair of packing rings arranged within the casing on oppositesides of the inlet opening, members adjustably,secured, one to each endof the casing, and arranged to press the rings against the plunger, oneof said members being closed at its outer end to form a hood withinwhich the plunger takes when valve is lolosed, and means for operatingsaid plunger.

3. A blow-off valve comprising a casing provided with inlet and outletopenings, a hollow cylindrical plunger open at one end and having anopening through its-side-wall whereby a passage through the plunger isformed, a pair of composite packing rings arranged within the casing onopposite sides of the inlet opening, members adjustably secured, one toeach end of the casing-and arranged to press the rings against theplunger, mechanism secured to the closed end of the plunger whereby thelatter is "operated, one of said members being closed at its outer endto form a hood through which the operating mechanism takes and intowhich the plunger moves when the valve is closed.

4. A blow-off valve comprising a casing.

provided with inlet and outlet openings, the interior of the casingbeing provided with beveled surfaces on opposite sides of. the inletopening, a pair of packing rings whose edges taper toward the outercircumference and take against the beveled surfaces ,in the casing, ahollow cylindrical plunger open at one end and provided with an openingthrough the side-wall to form a passage through the plunger, a pair ofmembers provided with beveled ends taking within the casing and ontosaid rings, one of said members having a closed end to form a hoodwithin which the plunger takes when in its closed position, and meanswhereby the pressure of said members on the rings may be regulated.

5. A blow-off valve comprising. a casing provided with inlet and outletopenings, the interior of the casing being provided with beveledsurfaces on opposite sides of the inlet opening, a pair of packing ringswhose edges taper toward the outer (aircim'iference and take against thebeveled surfaces in the casing, a hollow cylindrical plunger open at oneend and provided with an opening through the side wall to form a passagethrough the plunger, a pair of members provided with beveled ends takingwithin the casing and compressing the rings, one of said members havinga closed end to form a hood within which the plunger takes when in itsclosed position and means extending through said hood whereby theplunger is reciprocated, the relation between. the means and hood beingsuch that the plunger is held against rotative movement.

(i. The combination in a blow off valve, of a casing open at both endsand provided with a side opening, the casing-interior be ing providedwith beveled surfaces at opposite sides of the side-opening, a hollowplunger open at one end and provided with an opening through its sideadapted to register with the side opening in said casing, a hollowmember adjustably secured to each end.

of said casing, the one member constituting a (continuation of theoutlet passage of said casing into which the plunger moves when thevalve is open, while the other member constitutes a hood into which theplunger is adapted to take, said members being provided with beveledends adapted to take into the casing, and composite packingringsprovided with beveled edges arranged intermediate of the beveledsurfaces in said casing and the beveled ends of the members and takingabout said plunger with means whereby said members are secured to saidcasing and the relation between the packingrings and the plungercontrolled.

HENRY V. JACOBS. Witnesses:

DAVID H. OWEN, D. O. THOMAS.

